1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Ivan
1 year ago
11

12) A radio transmission tower is 170 feet tall. How long should a guy wire be if it is to be attached 15 feet from the top and

is to make an angle of 30° with the ground? Give your answer to the nearest tenth of a foot.
13) A building 230 feet tall casts a 100 foot long shadow. If a person looks down from the top of the building, what is the measure of the angle between the end of the shadow and the vertical side of the building (to the nearest degree)? (Assume the person's eyes are level with the top of the building.)
Mathematics
1 answer:
ser-zykov [4K]1 year ago
6 0

The length of guy wire needed to make an angle of 30° with the ground is 310 feet. The angle between the end of the shadow and the vertical side of the building is 23°

<h3>What is trigonometric ratio?</h3>

Trigonometric ratio is used to show the relationship between the sides and angles of a right angled triangle.

a) Let l represent the length of the guy wire.

sin(30) = (170 - 15) / l

l = 310 feet

b) Let Ф represent the angle, hence:

tanФ = 100/230

Ф = 23°

The length of guy wire needed to make an angle of 30° with the ground is 310 feet. The angle between the end of the shadow and the vertical side of the building is 23°

Find out more on trigonometric ratio at: brainly.com/question/24349828

You might be interested in
4 over 15 × 10 over 8
vlabodo [156]
The answer is 1/3. Hope I helped
6 0
3 years ago
Find the inverse function of
shtirl [24]

Answer:

f(x) = 20x - 4 \\ substitute \: y \: for \: f(x) \\ y = 20x - 4 \\ interchange \: x \: and \: y \\ x = 20y - 4 \\ swap \: the \: sides \: of \: the \: equation \\ 20y - 4 = x \\ move \: the \: constant \: to \: the \: right \: hand \\ 20y = x + 4  \\ divide \: both \: sides \: by \: 20 \\ y =  \frac{1}{20} x +  \frac{1}{5}  \\ substitute \: f {}^{ - 1} (x) \: for \: y \\ f {}^{ - 1} (x) =  \frac{1}{20} x +  \frac{1}{5}

The domain of the inverse of a relation is the same as the range of the original relation. In other words, the y-values of the relation are the x-values of the inverse.

Thus, domain of f(x): x∈R = range of f¯¹(x)

and range of f(x): x∈R =domain of f¯¹(x)

3 0
2 years ago
5x + 7 = 2x - 8 can anyone say how to solve please ​
SCORPION-xisa [38]

Answer:

x = - 5

Step-by-step explanation:

Given

5x + 7 = 2x - 8 ( subtract 2x from both sides )

3x + 7 = - 8 ( subtract 7 from both sides )

3x = - 15 ( divide both sides by 3 )

x = - 5

4 0
2 years ago
There are 6 girls and 7 boys in a class. A team of 10 players is to be selected from the class. How many different combinations
Anna71 [15]
13C10 = 13C3 = 13x12x11/(1x2x3) =
"286 ways".
4 0
3 years ago
Read 2 more answers
Plz plz help fast <br> I will mark Brainlyist
Licemer1 [7]

Answer:

forgive me i need points

Step-by-step explanation:

7 0
2 years ago
Other questions:
  • 3.5.57
    12·1 answer
  • Given the function f(x) = 3x + 1, evaluate f(a + 1). 3 a + 2 3 a + 4 3 a + 1
    12·1 answer
  • Can someone please answer this ASAP it’s a quiz and I need to get a good grade on it I will give you five stars
    8·1 answer
  • Last month, Edwin had $2325.35 that he divided into two bank accounts. He deposited into a savings account. He deposited the res
    6·1 answer
  • What letter is located by the ordered (5,-2)
    8·1 answer
  • If the black cloth absorbs heat energy, why was the ice cube at room temperature covered with the black cloth the slowest to mel
    6·1 answer
  • What is the value of -1/6+2/3(9-3/4)-1/2
    9·1 answer
  • Eight meters is equal to how many centimeters
    8·2 answers
  • PLSSS HELP IF YOU TURLY KNOW THISS
    7·1 answer
  • Evaluate f(-2) if f(x) = x²+ 3x +1
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!